Bulletin of the National Research Centre

Table 4 Rate constant and R² at different ore particle sizes

From: Effects of alkali solution on the dissolution kinetics and optimization processes of iron from Akwuke ore

Particle sizes (μm)	Surface chemical		Diffusion controlled
Particle sizes (μm)	Ks (min¯¹)	R²	Kd (min¯¹)	R²
45	0.0013	0.994	0.0010	0.997
75	0.0014	0.995	0.0013	0.998
150	0.0018	0.995	0.0015	0.998
300	0.0019	0.995	0.0017	0.998
600	0.0022	0.996	0.0020	0.998

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